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Physical Chemistry

Blazing goIITian

Joined:	22 Jan 2007
Post:	2039

1 Mar 2008 21:35:03 IST

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251

electro

None

The standard electrode potential of is :
(
Options:
A. 0.675 V
B. 2.15 V
C. 2.275 V
D. 3.75 V

ans-C

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LAMPARD

Blazing goIITian

Joined: 1 May 2007

Posts: 777

2 Mar 2008 14:59:14 IST

Like 1 people liked this

Ag₂S

2Ag⁺ + S^2- ;K=Ksp
Ag + Ag₂S

Ag+2Ag⁺ +S^2-
This cell is represented as
Ag|Ag⁺||S^2-,Ag₂S(s)|Ag
The mechanism is as follows---
Ag(s)

Ag⁺ +e-
Ag₂S(s) +e-

Ag(s)+S^2-
___________________
Ag₂S(s)

2Ag⁺ + S^2-
Applying nernst equation...
E(Ag|Ag⁺)+E(S^2-,Ag₂S|Ag) =-[0.0591(logKsp)]/2

Subst. the values,u get option c..
Hope u got it....

Neeraj Agarwal

Blazing goIITian

Joined: 22 Jan 2007

Posts: 2039

3 Mar 2008 11:13:50 IST

Like 0 people liked this

thanx....

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